Method and apparatus for reducing curl in wound rolls of photogr

Details Method and apparatus for reducing curl in wound rolls of photogr Method and apparatus for reducing curl in wound rolls of photogr

1996-08-29

1998-08-18

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Controlling heat transfer with molding material

264234, 264235, 264280, 264285, B29C 5318

Patent

active

057955123

ABSTRACT:
A method for reducing curl in a stored photographic film which aids in preventing serious difficulties with downstream film transport and handling of the film. The film, which has been stored as a roll wound on a first core or mandrel is unwound from the first core and wound onto a second core or mandrel in a first direction. The film is then unwound from the second core to yield a traveling web portion. The traveling web portion is preheated to a predetermined temperature while being continuously delivered to a housing. The film is wound onto a third core or mandrel located within the housing in a direction opposite the first direction where it is maintained at about the same predetermined temperature.

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J. Greener, A.H. Tsou, K.C. Ng, and W.A. Chen, The Bending Recovery of Polymer Films, May 23, 1990.

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